Selector for automatic telephone-exchanges.



PATENTED JULY 17, 1906.

J. L. MQQUARRIB. SELECTOR FOR AUTOMATIC TELEPHONE EXCHANGES.

APPLICATION FILED 001. 16, 1905.

3 SHEETS-SHEET 1.

No. 826,350. PATENTED JULY 17,1906.

J. L. MOQUARRIE.

SELECTOR FOR AUTOMATIC TELEPHONE EXCHANGES. APPLICATION FILED OUT. 16, 1905.

3 SHEETS-SHEET 2.

igizmeaseax -Z ZUGZZZ'ZZJ J. L. MQQUARRIE. v SELECTOR FOR AUTOMATIC TELEPHONE EXCHANGES.

APPLICATION FILED O0T.16, 1905.

PATENTED JULY 17, 1906.

3 SHEETS-SHEET 3.

JAMES L. MGQUARRIE, OF llEW YORK, N. Y., ASSlGlfltllt T0 t l Ed ie ELECTRIC COMPANY, OF CHICAGO, lLlJlllOlS, A GQRPSRAE lLLlNOl S.

Specification of etters Eatcnt.

Li A Kill Implication filed October 16. 1905. semi no. 283,002.

To all whmn, it 1nd con/corn:

Be it known that I, JAMns L; MoQUARRZE, a citizen of the United States, residing at New York, in the county of Newv York and State of New York, have invented a certain new and useful lmproven'ient in Selectors for Automatic Telephone-Exchanges, of which the following is a full, clear, concise, and exact description My invention relates to a selector for an automatic exchange system; and its object is to provide an improved arrangement of the electromagnets and their armatures and the pawls actuated thereby to control the movement or" the selector-arm.

In my invention the electromagnets vare arranged on the under side of the plate which carries the-trailer-arm, and the cores of said electromagnets extend through open-' ings in the plate'to the opposite side. My invention thus provides a compact arrange ment of the variohs parts of the selector, all

suitably mounted upon a single plate.

I Will describe my invention in detail by reference to the accompanying drawings, in which Figure l is a plan view of the selector mechanism which is provided for each line at the central oilice. Fig. 2 is a side elevation of the selector mechanism, the supporting-frame carrying the switch-contacts being in cross-section. Fig. 3 is a section on line 3 3 of Fig. 1, and Fig. 4 is a section on line 44 oi Fig. 1.

' he same letters ofreference are used to designate the same parts wherever they are shown.

Each selector is provided, as usual, with circular rows of terminal pieces or contacts a aimonntcd upon the selector-frame a. Each selector is also provided with an arm I), fas tened radially upon a ratchet-wheel b which is' mounted in a suitable frame, so as to rotate ahove the supporting-plate e Said ratchet-wheel is arranged to be rotated by a stepping magnet c and to be held in its advanced 'position by a retaining-magnet d. The selector-arm l), which is advanced by the rotation of the ratchet-wheel, carries two contact-brushes l) 1), adapted to trail over the pairs of stationary line-terminals a (1?, arranged in a circle about its axis.

The elcctromagncts c and (l are disposed tending through openings in. said an scoured oy screws or in any other beneath the plate 6, with. their cores 0 d ere d secured by screws f g to brackets fg, respectively, brackets he soita or manner shove the plate 6. The per the cores 4: c" prcfiecting through are cut away at c d as shown, i l 3, respectively, to flat s. cent to the legs or" the hracioets order that cores may h position thcirsupports.

The yoke pieces c oi the electronra oets have adjnsta lolc screws 0'' d" tend ing through them, forming for t the rods 0 e usper ends of said rods have enlarg i heads I 3 resoectively, which project t rough crashin in the plate 6 and form sn; matures c d or' the electromegncts. d extend from said armature-3s thro secured in openings in the brackets; The arrnatures c d are thus 1 ino untid between the projecting core pieceo e c and d d, respectively The armature c ot the stepping; magnet 13' carries a pawl c", which when said arr is: in its normal unattraoted position held n A $1 lower. eno. 8L

by the pin h out oi engagement with the teeth of the ratchet-wheel l). "l/l lmri the ar mature is attracted, the pawl c is released I from the pin Ft and is drawn by spring into 8 engagement withthe teeth. of the ratchetwheel to advance the same one step for each impulse of current through steppingmaggnct.

The armature d of the retaining' rnagnet controls a pawl d, normally holdingthe same out of engagement with the ratchet-wheel o as shown in Fig. 1. When the armature d is in its attracted position, the pawl d is released and holds the ratchet-wheel in its ad tracted; W hen the magnet is deenergized, its armature d is drawn hatch: by :t spring and withdraws the pm l (2 from engagement with the ratchet-Wheel. Said wheel and the arm I) are then retm'ned to their initial position in the usual nun'incr by I coiled spring 8. (Shown in Fig. 2.)

1. In a selector for an automatic telephoneexchange, the combination with a ratchet carrying a SGlOCliOI'filTII'l, of a plate upon which said ratchetis mounted, an electromagnet for actuating said ratcl'let, said magnet being disposed upon the roar of the plate with its core-piece proj tting through an opening in" the same, and a bracket mounted upon'the front of the plate and providing a support for said core-pure and magnet.

In a selector for an automatic telephoneexchange, the coxnbinatimiwith it ratchet carrying a selector-arm, ol' :1. plate upon which said ratchet mounted, on elcct.ro magnet disposed upon the rear said plate and. having a core-piece projecting through an opening in tho some, a bracket mounted upon the front oi the plate and providing a support for said corepiece and magnet, an armature for said magnet pivotally secured to said bracket, and inc-ens controlled by said armature for actuating said ratchet.

3. In a selector for an automzux-ic exchange, the con'ibination with a ratchet carrying a selector-arm, of a plate upon which said ratchet is mounted, an electromagnet 'lor actuating said ratchet, said magnet being disposed upon the rear of the plate with its core-pieces projecting through openings in the same, a bracket mounted upon the front of the plate to which said core-pieces are secured, a rod having a pivotal bearing in the yoke of the electromagnct and extending through an opening in the plate, an armature secured to said rod above the plate and between the poles of the magnet, and mechanism actuated by said armature to: controlling the movement of said ratchet.

4. The combination with a selector-frame provided with a series cl circulcurly-arranged contact-terminals, of a plate secured to said frame within the circle of said terminals, a ratchet-wheel. rotatabiy mounted above said plate, a selector-arm carried hy'said Wheel and provided with contact-hrushes adapted to tail over said terminals, two electromagnets disposed upon the rear of the plate, on ch having its core pieces extending through openings in said plate, brackets nountcd upon the front of the plate to which said core-pieces are secured, an arms ture for each magnet pivoted to said brackets between the opposite poles of the magnet, and pawls controlled hy said arinatures for? advancing the ratchet-Wheel and for holding said wheel in its advanced position.

5. In an automatic telcpllone-exchange system, the combination with a selectorframe provided with a series of circularlymrranged line-terminals, oi update secured to said frame within the circle of said terminals, a ratchet-wheel rotatably mounted above said plate, a selector-arm radially secured to said wheel and provided with contact-ln'ushcs adapted to trail over said terminals, electronmgnets disposed upon the bottom of the plate having core-pieces extending through openings in the same, a bracket for each magnet mounted upon the top of the plate and to which said core-pieces are secured, rods pivotally mounted in djustable bearings *arried by the yokes r i the (tlQCtIOIllztffnets, an enlarged slotted head for each rod extending through an opening in the plate, an armature for each magnet scoured within said slotted head and provided with a pin cxtending through an opening in the corresponding bracket, and means actuated by said armatures for controlling the movement of said ratchet-wheel and selector-arm.

6. In a selector i'oran automatic telephoneexchange, the combination with a ratchet carrying a selector-arm, of a plate upon which said ratchet is mounted, an electromagnet disposed upon the rear of the plate with its core-piece projecting through an opening inthe same, an armeture pivoted above the plate, and means controlled by the movement of said armature to control. the movement of said ratchet.

In witness whereof i hereunto subscribe my name this 21st day of August, A. D. 1905.

, JAMES L. i'vIcQUARRlE. Witnesses:

' JENNIE G. LAMB,

H. F. ALLRIGIIT. 

